#include <stdio.h>

#include <stdlib.h>

#include <unistd.h>

int main(int argc, char const *argv[])
{
    int ret;
    char * const argv[] = {"ls", "-l", NULL};
    ret = execv("./app.exe", argv);
    if (ret == -1) {
        perror("execv errror \n");
    }
    return 0;
}
